Reversible whetstone.



P. 15. MARTIN.

REVERSIBLE WHETSTONE.

APPLICATION FILED JULY 6,1909.

Patented Mar. 15, 1910.

witmeooco MTED STATES rarnn'r orrrcii.

FRANK D. MARTIN, OF CHESTER, VERMONT.

REVERSIBLE WHETSTONE.

T 0 all whom it may concern:

Be it known that I, FRANK D. MARTIN, a citizen of the United States,residing at Chester, in the county of Vindsor and State of'Vermont, haveinvented certain new and useful Improvements in Reversible l-Vhetstones,of which the following is a specification.

This invention relates to hones, and pertains especially to the class ofreversible whetstones or bones.

The object of the invention is to provide certain novel and peculiardevices for mounting and reversing whetstones or hones so that they maybe expeditiously revolved and held in reversed position for sharpeningrazors, edge tools and the like.

A further object of the invention is to provide a hinged covered casingor box having novel and peculiar devices for pivotally hanging aWhetstone therein, and having 1 means for holding the stone againstpivot movement.

As far as known to applicant, this class of stones or hones has beenreversibly held at the ends by stands, frames or supports having variousdevices for holding and releasing the stone. Such devices requireseparate and independent operation, first to releasefor reversing thestone, and then to fix the stone in reversed position; such stones beingexposed or withoutan inclosing box or casin It is therefore the purposeof this invention to overcome the various objections and disadvantagesfound in the usual mounting of reversible whetstones, and to provide aninclosing box or caslng carrying means for clamping and pivoting thestoneand its frame therein, and means within the box and operated bysuch frame to catch and hold the frame with the stone exposed in properposition for whetting.

In the accompanying drawings forming part of this application: Figure 1is a perspective view showing the stone in position for whetting. Fig. 2is a transverse sectional view taken through the pivot ends. Fig. 3 is across section taken through the spring catch with the stone in swingingposition. Fig. 4 is a detail perspective view of the spring catch. Fig.5 is a detail perspective view of one of the pivots. Fig. 6 is a similarview of the other pivot.

Specification of Letters Patent. Patented Mar. 15, 191). Applicationfiled July 6, 1909.

Serial No. 506,120.

The same reference numerals denote the same parts throughout the severalviews of the drawings.

The box or casing 1 may be of any desired shape or size in keeping withthe particular size and shape of the stone to be operated in it, but Iprefer a rectangular box or casing having a flanged lid or cover 2hinged at 3, and provided with a suitable clasp, latch or keeper 4 toengage a pin 5 on the side of the box. One end of the box has a plate 6secured to its inner face, and said plate is provided with a pivot-pin 7to the inner face of the other end of the box is secured a similar plate8 having a collar 9 extending through the box end, this collar is screw-.threaded internally and opens through the plate 8, for the purpose ofoperating an adjustable screw-pivot 10 there through from the outside ofthe box end. This pivot 10 has two functions as will hereinafter appear.

, The stone 11 has whetting surfaces of two grades, and is held in aframe 12 at one end by set-screws 13, and at the other end by the pivot10, which extends through this end of the frame and engages this end ofthe stone. The other end of the frame has a recess or cavity for thepivot-pin 7, so that the stone is clamped in the frame by the pivot 10,thereby permitting removal of the stone from the frame without removingthe frame from the box.

The frame and its stone is held in reversible position by a spring catch14, secured in a cavity 15 of the box side, and having a "catch has aprojecting lip 17 to engage a groove or cavity 18 in the sides of thestone frame. This catch is operated by the frame in swinging, so thatthe lip will enter the frame groove and thereby hold the frame and itsstone in proper position for whettin the stone, the catch is simplydepressed or sprung backward. The side flange of the cover or lid has anotch or cut-out 20 for the top of the catch 14, so as to permit the lidto close the box without interfering with the catch.

It will be observed that the frame is pivoted adjacent the top edge ofthe box so as to expose either side of the stone sufliciently To releasethe frame for .reversing above the frame and the top edge of the box forwhetting pur oses without interference with any part of the box.

It is obvious that the frame may be fitted with various stones asdesired without removing the frame from the box; that one and the sameoperation ofthe screw-pivot will clamp the stone in the frame andconnect the latter with the box; and that by simply tilting or swingingthe frame it will reverse itself and operate the catch to hold it inreversed position.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1, In reversible whetstones, the combination, with a frame fitting thestone, and a covered box or casing forinclosin the stone and in whichthe frame is hung tor reversing the stone, of a fixed pivot for one endof the frame, a screw-pivot operated through the other end of the framefor holding the emcee stone in the frame and adapted to permit the frameto swing thereon for reversing the stone, and means for holding theframe in reversed position.

' 2. In reversible whetstones, the combination, with a frame fitting thestone, and a covered box or casing for inclosin the stone and in whichthe frame is hung or reversing the stone, of a pair of plates secured tothe box ends one of which plates having a fixed pivot and the other anadjustable pivot adapted to be operated for pivoting the frame and forholding the stone in the frame, and a spring catch carried within thebox and engaging the frame for holding it in reversed position.

In witness whereof I hereunto set my hand in the presence of twowitnesses.

FRANK D. MARTIN. Witnesses:

ALICE A. HENRY, HUGH HENRY.

